Wasn't it her real hair in the Encores production? Actresses on Broadway rarely use their own hair. Even Laura Bell Bundy uses a wig on LEGALLY BLONDE. It's just easier.
I dislike the Ravinia wig as well, Encores! got it much better.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"